📊 Mono Bar Chart w/o Measures

If any measures are not specified, the count of each data points will stand for the length of bar.

🔑 Sample Code 

jelly.bar()
  .container('#jelly-container')
  .data([
    {category:'Blue', name: 'A', value: 10},
    {category:'Blue', name: 'B', value: 20},
    {category:'Blue', name: 'C', value: 30},
    {category:'Blue', name: 'D', value: 40},
    {category:'Red', name: 'A', value: 20},
    {category:'Red', name: 'B', value: 10},
    {category:'Red', name: 'C', value: 40},
    {category:'Red', name: 'D', value: 10}
  ])
  .dimensions(['name'])
  .axis('x').axis('y')
  .render();